Shredding means



July 31, 1962 o. RoTRl-:KL 3,047,028

SHREDDING MEANS Filed Sept. lO, 1958 2 Sheets-Sheet 1 .V' w mi l@ QIJuly 31, 1962 `o. ROTREKI. 3,047,028

SHREDDING MEANS Filed Sept. lo, 1958 2 Sheets-Sheet 2 INVENTOR. atta 2rua United States Patent O M 3,047,028 Sl-REDDING lViEANS Otto Ron-ekl,Brno, Czechoslovakia, assignor to Sdruzeni podniku textilnihostrojirenstvi, Chrastava, Czecho- Slovakia Filed Sept. 10, 1958, Ser.No. 760,180 3 Claims. (Cl. 139-57) The invention relates to weavinglooms and is concerned with. heald shaft raising devices for producingselectively a warp weave or weft weave of the woven cloth. A separaterotating cam is associated with each shaft which cam co-acts withshifting rods which are mounted in guides and serve for the movement ofthe heald shafts. According to the invention the shifting rods arecranked and the axis of rotation of the rotating cams lies in a planeformed by the straight portions of the cranked shifting rod, and aroller is provided at one end of the crank of the shifting rod, whichroller co-acts with the cam. The change from warp weave to weft weave isthen effected by turning of the shifting rod through 180 with respect tothe rotary axis of the rotating cams. Weft weaves are characterized bythe predominance of weft threads on the upper side of the woven fabric.Warp weaves are characterized by predominance of warp threads on theupper side `of the fabric.

As a result of this arrangement, the change from warp weave to weftweave may be effected with a single cam in a simple manner, whilst knowncam-operated heald machines require two diiferent cams for this purpose.

A constructional example of a heald-shaft machine according to theinvention is illustrated in the accompanying drawings.

FIG. 1 is a schematic fragmentary elevation illustrating the device inthe position for a weft weave;

FIG. 2 is a fragmentary schematic elevation illustrating the device in aposition yfor a warp weave;

FIG. 3 is a fragmentary schematic elevation illustrating the deviceprovided with a spring and in the position for a warp weave, the upperposition of the heald shaft being shown by chain lines in FIGS. l to 3;

FIG. 4 is a fragmentary schematic elevation of the device in theposition for -a warp weave, the device having a cam with a cam groove;and

FIG. 5 is a fragmentary sectional View illustrating the cam arrangementof the device shown in FIG. 4.

The heald shaft 1 is actuated by means of` two tie rods 2. Each tie rodis articulated to an arm of a two-armed lever 3 which is pivotallymounted about a pivot pin 4 fixed to the frame of the machine. The otherarm of the lever 3 is articulated to a connecting rod 5, which in turnis articulated by means of a link 1'1 to the cranked shiftingrrod 6which is slidably guided in guides 7. A roller 8 mounted at one end ofthe cranked part of the rod 6 rolls over the circumference of a cam 9which is rigidly connected to a shaft 10. As a result of the rotation ofthe shaft 10 and the cam 9, the heald shaft l is reciprocated up anddown by means of the described leverage. The axes of the links 11 of theshifting rod 6, of the guides of the roller 8, andthe rotary axis 10 ofthe cams 9 lie in a common plane.

The roller 8 moves in succession over the points a, b, c, d of the cam 9as shown in FIGURE l. This means that the heald shaft is in the lowershed position when the roller is in the region of the points a, b, d,and it is in the upper shed position when the roller is in the region ofpoint c so that a weft weave is effected since the greater number ofshafts 1 are located at the lower part of the shed while the remainingshafts (not shown) are located at the upper part of the shed. After theinsertion of the weft, the successive shed has to be formed 3,41%@Patented July 31, l 962 by reciprocating the position of the healdshafts from the raised position to the lowered position and vice versa.if the heald shaft mechanism is so arranged as to leave, during thischanging procedure the major portion of the shafts in the raisedposition while a smaller portion remains in the lower position of theshed, a warp weave is obtained. if, however, the major portion of theshafts remains in the lower position of the shed a weft weave results.

If the shifting rod 6 is turned 180 with respect to the rotary axis ofcam 9 to the position according to FIG- URE 2, then the heald `shaft 1is in the lower shed position only in the region of point c and it is inthe upper shed position in the region of the points a, b, d, so that awarp weave is obtained. The roller S of FIG. 2 may be maintained inengagement with the periphery of the cam 9 in any suitable way. Forexample, as shown in FIG. 3, a spring il may be connected to thesupporting frame 7 and to an armof the right lever 3 to continuouslyurge the roller 8 toward the cam and thus maintain it at all times inengagement with the periphery of the cam. Also, as is indicated in FIGS.4 and 5, the cam may be provided with a camming groove in which theroller 8 is located `so that this roller is confined to the groove andthus remains at all times in engagement with the periphery of the cam.

In this position, roller 8 positively co-acts with cam 9, and is, forexample, guided in a ca-m groove 9a, -as shown in FIGS. 4 and 5. It isalso possible to use a spring 12, see FIG. 3, to urge roller ,S in aconventional manner against the periphery of cam 9.

What I c-laim is:

1. In a heald shaft weavingmachine, in combination, a heald shaftmovable between two positions for effecting a warp weave and a weftweave, respectively; linkage means connected to said heald shaft andbeing movable between two positions for shifting' said heald shaftbetween said positions; a pair of guide means aligned in a plane;shifting means including two supporting portions guided in said guidemeans -for movement in said plane and an intermediate connectingportion; a cam follower on said shifting means between one of saidsupporting portions and said connecting portion; and a rotary cam havingan axis located in said plane between said supporting portions andhaving a cam portion of smaller eccentricity and a cam portion ofgreater eccentricity successively engaging said cam follower duringrotation of said cam whereby said shifting means is shifted in saidplane; and means for etachably connecting said supporting portions ofsaid shifting means to said linkage means `so that upon turning of saidshifting means with respect to said axis of said rotary cam through andinterchange of sa-id supporting portions in said guide means differentweaves are produced.

2. In a heald shaft weaving machine, in combination, i

a heald shaft movable between two positions for effecting a warp weaveand a weft weave, respectively; linkage means connected to said healdshaft and being movable between two positions for shifting said healdshaft between said positions; a pair of guide fmeans aligned in a plane;shifting means including two supporting portions guided in said guidemeans for movement in said plane and an intermediate connecting portion;a cam follower mounted on said shifting means between one of saidsupporting portions and said connecting portion and in said plane; arotary cam having an `axis located in said plane between said supportingportions and having a cam portion of smaller eccentricity and a camportion of greater eccentricity spaced 180 and successively engagingsaid cam follower during rotation of said earn whereby said shiftingmeans is shifted in said plane; and

means for detachably connecting said supporting portions of saidshifting means to said linkage means so that upon turning of saidshifting means with respect to said axis of said rotary Ycam through 180and interchangeof said supporting portions ingsaid guide means differentweaves are produced. s

, 3. In a heald shaft weaving machine, in combination, a heald shaftVmovable between two positions for effecting a warp weave and a weftweave, respectively; linkage means connected to said heald shaft yandbeing ymovable between two positions for shifting said heald shaft beiflower during rotation of said cam whereby said shifting means is shiftedin said plane; and means for detachably connecting said shifting means-to said linkage means so that upon turning of said shifting means withrespect to said axis of said rotary cam through 180 different weaves areproduced.

Y References Cited in the le of this patent UNITED'STATES PATENTS 59,613Knowles Nov. 13, 1866 1,339,716 Sabbag E May 11, 1920 1,662,931 LucasMar.v v20, 1928 Y v FOREIGN PATENTS 1,901,012 France Feb. l19, 1952

